Title Bar - Cosmology

Activity: Galactic Brightness

Listed in several textbooks (including Kauffman 1994 p.482) there is a table which shows pictures of galaxies along with their spectra demonstrating their red shift. Have the students calculate the distances to these galaxies, as discussed above, and notice that the more distant the object is, the dimmer it appears. Making a graph of estimated Brightness versus Distance may help the students see and appreciate the relationship between apparent brightness and luminosity.

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